Calculating-machine.



Patented Aug. 6, 1918. 2 SHEETS-SHEET l Gig 7 4.. lg El. N I4 .H2 CLC. LAW UMF OGD DI NIM l ILN U0 ACU .LA AC Cu DI P .A

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CALCULATING MACHINE.

APPucATloN man ri. 24. 1914.

1,274,572. Patented Aug. 6, 1918.

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NITED STATES. PATENT OFFICE'.

ARTHUR F. POOLE, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE WAHL COMPANY, OF

WILMINGTON, DELAWARE, A CORPORATION OF DELAWARE.- y

CALCULATING-MACHINE.

Specication of Letters Patent.

Patented A110. 6, 1918.

Application filed February 24, 1914. Serial No. 820,602.

Toy all whom t may concern.'

Be it known that I, ARTHUR F. POOLE, a citizen of the United States, residing at Chicago, in the county of Cook and State oic Illinois, have invented certain new and useful Improvements in Calculating-Machines, of which the following is a speci-v lish money, which has a table as follows:

12 pence v 1 Shilling Q0 shillings 1 pound AnotherV example of a table other than the decimal system is the Indian currency table of piesv and annas, as follows:

12 pies 1 1 anna 16 annas 1 rupee It will be observed that in the two tables mentioned above, there arises the necessity of inserting` a number larger. than 10 in the totalizer, such for instance, if one wished to insert 11 pence in the Englishtable, or lilannas in the Indian currency table given above. In Patent #893,720, to Hyman Eli Goldbeiglis disclosed a method of handling ynumbers of this kind. The actuator is provided with a special key printing 1, and revolving the master wheel 10 spaces, thereby inserting. 10 in the totalizer and printing 1 on-the work sheet. This special key is used in the following way:

Assume one to be working with a totalizer in the English money table, and that one wishes to insert 11 pence into the totalizer. The totalizer is brought to the tens place of the pence denomination, and the special key is operated. This prints l on the work sheet and inserts 10 units into the totalizer. The totalizer then escapes to, the units decimal place of the pence denomination, and the l key is operated. This key inserts l in the totalizer and prints 1 on the work sheet to the right `of the 1 previously printed. As a result oli' these operations, l1 is. printed on the work sheet and 11 is inserted in the totalizer.

It is apparent that with the arrangement described above, there exists some liability of confusion or mistake due to the fact that the operator has two keys on lier typewriter, which print 1, viz., the ordinary numeral key and the special key. It has been cus tomary to distinguish these keys by making the 1 printed by the special key, which it will be remembered inserts 10 into the totaliZer, have a characteristic type (littering in appearance from that Yon the 1 key, but nevertheless, the fact remains that when the tot-alizer is in the tens decimal place of the pence denominations, either key printing 1 may be operated, and if the ordinary key is operated in this place, an erroneous calculation results.'

It is one of the objects of my invention to so interlock the special key above referred to, and the ordinary 1 key that when the totalizer is in av position requiring the use of the special key, the ordinary 1 key, and in fact all the other numeral keys of the calculating machine, are locked, and on the other hand as soon as the totalizer moves from the decimal place requiring the use of the Aspecial key, the special key itself is locked, and all the other numeral keys are unlocked. In my. pending application for improvementsl in calculating machines .ti-809,932, iiled January/'2nd, 1914,I have shown one form of lock which performs the above recited function, and this lock has been shown in connection with a totalizer adapted to calculate in the long ton table. My present invention is in the nature of an improvement upon or variationfrom the special key lock shown in the above entitled application, and is shown inv connection with a totalizer adapted .to calculate in the Indian currency table, one adapted to calculate in the English money table, and one adapted to calculate in the ordinary decima] table. The device shown in my presenty application is4 i keys;

adapted to coperate with totalizers of all these tables. i Y

A further object of my invention is to provide an interlock for numeral keys which shall be very simple in its construction and positive in its action, and shall employ parts of the Vahl actuator which Aare already required for another function.

These and other objects of my invention are describedl in the accompanying specifications, in the drawings of which- Figure 1 is a partial front elevation of a calculating machine equipped with my device, Y

Fig; 2 is afperspective View of the lock for the keys, j

Fig. 3 is a side view taken along the section line 3-3 of Fig. 4,

YVcam 21, Vto the extreme right hand position Fig. 4 is a viewtaken along the line 4 4V of Fig. 3,

Fig.V 5 is a plan view of the numeral I have shown myY invention as applied to the calculating machine described in the cited patent to lVahl. chine `contains a large number of parts which are not material to the understandingof my present invention, and would Since the lVahl ma-V only confuse the description thereof, I have omitted showing these Vparts in the dra-wings, and shall not enter into any particular description of them.v Reference may be had tothe cited patent to Vahl where the operation of this adding and subtracting attachmentA is vthoroughly described.V

I shall premise that there is a typewriter 10, equipped with a TWahl adding and suby fan. These fans '18 and 18l coperat'e'with a singlefkey mechanism best shown in the rear-view of 4, the. object of this meehi -of aseries Vof cams 19 and 21'pivoted in the tracting` attachment,"and that this attachment is operated bythe keys 11, whichprint the numbersl, 2, 3, 4, 5, 6,7, 8, and v9 and insertlike numbers into the tot-alizers 12, 13,

and 14, which are mounted on a truck 15,V which travels step by Vstep through the actuation,v of lthe keys 11. taclnnent is also provided with a special key which I number` 16, and this key so. arranged as to print a1 on the worksheet and simultaneously insert l1 0intoV any totali'zenwhich may be in a position to be'actuated thereby. It will be observed inl Figs. 1

thespecialkey 16 are connected by a pull rod 17 to fans 18 and'18 in the actuator. Consequently' theoperationV of any of these keysV results in the rotation of the connected anisin being to prevent the simultaneoi'isoperation ofl more than one key. It consists i frame work at 20. Tliecam 19 on the eX- treme right has a pin 25 rigidly attached thereto, which moves in a slot 26 in the The calculating at- Vof these fans maybe operated at one time.

The fan numbered 18 is the one which is connected tothe special'key 16. It will be observed that when the parts are inthe position shown in Fig. 4, the position of the cam 21, as held by the slot 23, is such that the operation vof this fan 18, and `consequently thespecial key 16 attached thereto, is prevented.V Also that `the operation of any of the fans 18, and consequently the keys V11 attached thereto, is permitted. Now, suppose the link 24 is depressed. The pin 22 will then engage the upper portion of the slot 23 and the cam 21 will be thrown to the right. This will close the gapl in the single key mechanism 4between the pin 25 and vthe pin. 22, thereby preventing the operation'of any of the fans 18, and will free thc fan- 18"'and itsconnected special key 16.

It Vis'obvious that the lowering ofthe link 24 will lock all the keys 11 and unlock the special key 16, and the returning of unlock all the keys 11. It remains therefore but to describe the mechanism connecting` this link 24 with the position of the to-Y talizers on the carriage to accomplish the-V resultsset forth Yin the "beginning :of this specification.l This will now be done.

V-Fi-votedto the frame work at 27 is a lever 28, which is pivotedto the link 24l by the stud 29. In the other end of this lever 28 land 3 that 'each of the numeral keys 11 and isa pin engaging a fork in a lever 31, rigidly attached toa shaft 32, which is pivot-ed in the frame work; a. spring 33 between the lever 31 and the Vframework 9servesl to holdv the chainnof.mechanism including the leversi 28and 31, and the link 24 in a norymal position determined by the contact of the pin 22 onthc lower end of the slot 2 3.

To'tlicfront'end of the shaft 32 (shown in Figs. 1,` 2, and '3) is attached an arm 34 carrying a roller 35, which roller coperates withV ca ms36 and 37 Ion* the totalizers 12 and 13.A It will be observed that cam 36 .hasprojections 38 andV 39, and cam 38 has projection 40.1V These projections are Yof proper length to depress the rQller 35 sinn" CII cien-tl-y to lower' the link 2l to itsk alternative position, thereby unlocking the special key 16, and locking the numeral keys 11 when said projections 38, 89 and 40 "are in contact with the roller 35.

In Fig. 1, I have shown three totalizers, 12, 13 and 11 upon the tot-alizer truck 15. Totalizer 12 is adapted to calculate in the Indian currency table, that is, 12 pies equal one anna, 16 annas equal one rupee. In this table there are two places in which the special key may be required to be used, that is, in the tens decimal place of the pie denomination and in the tens decimal place of the anna denomination. By providing the two projections 38 and 39 on the cam 36, I unlock the special key 16 at these two points and lock the keys 11. At any other point on this totalizer, the key 16 is locked and the keys 11 are unlocked.

rIhe totalizer 13 is shown as calcula-ting in the English money table, which is, 12 pence make one shilling, 20 shillings make one pound. There is but one place on this totalizer in which the special key is required to be operated, that is, in the tens place of the pence denomination. I therefore show one projection 40 on the cam 37 attached to this totalizer.

Totalizer 14 is adapted to calculate in the ordinary decimal system, in which system the special key 16 will never be required4 to be used. I therefore show the cam 41 attached to this totalizer without any projection. Consequently the special key is always locked, and the ordinary keys 11 are always Y unlocked.

From what has been said. it will be obvious that all the IVahl calculating machines could be provided with this special key 16, and that this special key would be inoperative except a totalizer were used having projections to engage the roller 35, in which case, the special key would be tree to operate in the particular position of the totalizer as determined by the cam associated therewith. I also wish to call attention to the fact that the interlock described in this present application may be used to advantage with the device forming the subject of my co-pending application above referred to.

Many changes and variations may be made in the precise form and device shown in this application without departing from the spirit thereof, since I claim:

1. In a calculating machine the combi-4 nation of a set ofvnumeral keys a single key locking mechanism comprising a group of shiftable cams acted on by said numeral keys; and means independent of said numeral keys for shifting one of said cams to an alternative position.

2. In a calculating machine the combination of: a set of numeral keys divided into two. parts; a single key locking mechanism including a set of cams acted on by said numeral keys; and means for shitting one of said cams to lock all of said. keys comprising one of said parts.

3. In a calculating machine the combination ot: a set of numeral keys divided into j two parts; a single key locking mechanism including a set of cams acted on by said numeral keys; and means for shifting one of said cams to lock the keys in either of said parts.

4. In a calculating machine the combination of: a set of numeral keys divided into two parts; a single key locking mechanism including a set of cams acted on by said numeral keys; and means for shitting the cam between said parts to thereby lock all of the keys in one or the other of said parts.

5. In a calculating machine the combination of: a set of numeral keys divided into two parts; a single key locking mechanism including a. set of cams acted on by said numeral keys; a traveling element; and means controlled by said traveling element for shifting one of said cams to lock all of said keys comprising one of said part-s.

6. In a calculating machine the combination of: aset of numeral keys divided into two parts; a single key locking mechanism; a set of cams acted on by one of said numeral keys; a traveling element; and means controlled by said traveling element for shitting one of said cams to lock the keys in either of said parts.

7. In a calculating machine the combination of: a set of numeral keys divided into two parts; a single key locking mechanism; a set of cams acted on by said numeral keys; a traveling element; and means for shitting the cam between said part-s to thereby lock all of said keys in one or the other of said parts.

S. In a calculating machine the combination of: a set of numeral keys divided into two parts; a single key locking mechanism including a set or' cams acted on by said numeral keys; a traveling element controlled by said numeral keys; and means controlled by said traveling element for shifting one of said cams to lock all of said keys comprising' one of said parts.

9. In a calculating machine the combination of: a set of immoral. keys divided into two parts; a single key locking mechanism; a set of cams acted on by one of said numeral keys; a traveling element controlled by said numeral. keys; and means controlled by said traveling element for shifting one of said cams to lock the keys in either of said parts.

10. In a calculating machine the combination of: a set of numeral keys divided into two parts; a single key locking mechanism;

` a set of'cams acted on by said numeral keys; scribed my name in the presence of two Wita traveling element controlled by said nunesses. meral keys.' and means controlled by said traveling element for shifting the cam bes ARTHUR POULE' tween said parts to thereby look all of said Witnesses: keys in one or the other of said parts. JOHN C. WAHL',

In Witness whereof, I have hereunto sub- F. LINDAHL.

Copies f this patent may be obtained for Ave cents each, by addressing the Commissioner e! Patents,

' Y Washington, D. G." 

